Methods:The subjects of this study were those who had gone under CABGin 501 Artesh Hospital and had passed one month of recovery. The subjects were divided into two groups of training (n=12) and control (n=12) after preliminary evaluations and performing exercise test. The patients underwent 4 weeks of interval exercise training, 3 times a week, in Tehran heart center. T-test was used to evaluate the intra-group differences and independent t-test was used to evaluate the difference between groups (p < 0.05).

Results:The result showed that parameters of HRV including TP, HF, LF and Lf/HF had been significantly affected by 4 weeks of interval exercise training. Interval exercise training had also significantly reduced the HRR in 1-3 min after exercise training.

Conclusion:As the two important indicators of mortality (HRV and HRR) had improved after interval exercise training, this type of exercise training can be recommended to the patients who undergo CABG for better recovery.